I recently added two additional WD20EARS (new hardware revision apparently) and migrated to a Raid 5.
Soon after the Migration finished successfully one of the harddrives went into a S.M.A.R.T. Status "Abnormal".
Since that usually means that the harddisk will fail soon, I replaced it.
However the RAID refuses to rebuild. If i try to recover it i get an error message:
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[RAID5 Disk Volume: Drive 1 2 3 4] RAID Recovery failed: Not enough devices to start the array.Searching the forums I only found one apparently similar case. However without a solution other than "QNAP Support did some magic trick" and 'apparently the disk had data on it'
Anyone got a decent idea how to fix my Raid again? (Hopefully without loosing my Data)
regards
Peter
Additional Info:
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[~] # cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4] [linear] [raid0] [raid10]
md0 : inactive sda3[0] sdb3[4](S) sdc3[1]
5855836800 blocks
md4 : active raid1 sdd2[2](S) sdc2[3](S) sdb2[1] sda2[0]
530048 blocks [2/2] [UU]
md13 : active raid1 sda4[0] sdd4[3] sdc4[2] sdb4[1]
458880 blocks [4/4] [UUUU]
bitmap: 0/57 pages [0KB], 4KB chunk
md9 : active raid1 sda1[0] sdd1[3] sdc1[2] sdb1[1]
530048 blocks [4/4] [UUUU]
bitmap: 3/65 pages [12KB], 4KB chunk
unused devices: <none>
[~] #Code: Select all
dmesg
tered for level 6
md: raid5 personality registered for level 5
md: raid4 personality registered for level 4
TCP cubic registered
NET: Registered protocol family 17
rtc kw_rtc: setting system clock to 2011-04-28 19:34:28 UTC (1304019268)
usb 1-1: new high speed USB device using ehci_marvell and address 2
sdd1 sdd2 sdd3 sdd4
sd 5:0:0:0: [sdd] Sector size 0 reported, assuming 512.
sda1 sda2 sda3 sda4
sd 5:0:0:0: [sdd] Attached SCSI disk
sdb1 sdb2 sdb3 sdb4
sd 2:0:0:0: [sda] Sector size 0 reported, assuming 512.
sd 3:0:0:0: [sdb] Sector size 0 reported, assuming 512.
sd 2:0:0:0: [sda] Attached SCSI disk
sd 3:0:0:0: [sdb] Attached SCSI disk
md: Waiting for all devices to be available before autodetect
md: If you don't use raid, use raid=noautodetect
md: Autodetecting RAID arrays.
md: Scanned 0 and added 0 devices.
md: autorun ...
md: ... autorun DONE.
RAMDISK: gzip image found at block 0
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 4 ports detected
VFS: Mounted root (ext2 filesystem) on device 1:0.
Freeing init memory: 136K
kjournald starting. Commit interval 5 seconds
EXT3-fs (sda1): mounted filesystem with writeback data mode
kjournald starting. Commit interval 5 seconds
EXT3-fs (sdb1): mounted filesystem with writeback data mode
kjournald starting. Commit interval 5 seconds
EXT3-fs (sdc1): mounted filesystem with writeback data mode
kjournald starting. Commit interval 5 seconds
EXT3-fs (sdd1): mounted filesystem with writeback data mode
md: md9 stopped.
md: bind<sdb1>
md: bind<sdc1>
md: bind<sdd1>
md: bind<sda1>
raid1: raid set md9 active with 4 out of 4 mirrors
md9: bitmap initialized from disk: read 5/5 pages, set 2 bits
created bitmap (65 pages) for device md9
md9: detected capacity change from 0 to 542769152
md9: unknown partition table
kjournald starting. Commit interval 5 seconds
EXT3-fs (md9): using internal journal
EXT3-fs (md9): mounted filesystem with writeback data mode
md: md13 stopped.
md: bind<sdb4>
md: bind<sdc4>
md: bind<sdd4>
md: bind<sda4>
raid1: raid set md13 active with 4 out of 4 mirrors
md13: bitmap initialized from disk: read 4/4 pages, set 2 bits
created bitmap (57 pages) for device md13
md13: detected capacity change from 0 to 469893120
md13: unknown partition table
kjournald starting. Commit interval 5 seconds
EXT3-fs (md9): using internal journal
EXT3-fs (md9): mounted filesystem with writeback data mode
kjournald starting. Commit interval 5 seconds
EXT3-fs (md9): using internal journal
EXT3-fs (md9): mounted filesystem with writeback data mode
kjournald starting. Commit interval 5 seconds
EXT3-fs (md13): using internal journal
EXT3-fs (md13): mounted filesystem with writeback data mode
fuse init (API version 7.13)
NET: Registered protocol family 5
md: linear personality registered for level -1
md: raid0 personality registered for level 0
md: raid10 personality registered for level 10
device-mapper: ioctl: 4.16.0-ioctl (2009-11-05) initialised: dm-devel@redhat.com
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
usbcore: registered new interface driver usblp
sysinfo: Module loaded.
ufsd: module license 'Commercial product' taints kernel.
Disabling lock debugging due to kernel taint
ufsd: driver U82 (Mar 31 2011 02:47:23) LBD=OFF with ioctl loaded at bf18a000
NTFS read/write support included
Hfs+/HfsX read/write support included
Slow work thread pool: Starting up
Slow work thread pool: Ready
lib80211: common routines for IEEE802.11 drivers
lib80211_crypt: registered algorithm 'NULL'
cfg80211: Calling CRDA to update world regulatory domain
Enable WDT...
usbcore: registered new interface driver snd-usb-audio
usbcore: registered new interface driver snd-usb-caiaq
eth0: link down
eth0: started
eth1: started
eth0: stopped
eth0: mac address changed
eth0: started
eth1: stopped
eth1: mac address changed
eth1: started
kjournald starting. Commit interval 5 seconds
EXT3-fs (md9): using internal journal
EXT3-fs (md9): mounted filesystem with writeback data mode
eth0: link up, full duplex, speed 1 Gbps
md: bind<sda2>
raid1: raid set md4 active with 1 out of 1 mirrors
md4: detected capacity change from 0 to 542769152
md4: unknown partition table
Adding 530040k swap on /dev/md4. Priority:-1 extents:1 across:530040k
md: bind<sdb2>
RAID1 conf printout:
--- wd:1 rd:2
disk 0, wo:0, o:1, dev:sda2
disk 1, wo:1, o:1, dev:sdb2
md: recovery of RAID array md4
md: minimum _guaranteed_ speed: 5000 KB/sec/disk.
md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for recovery.
md: using 128k window, over a total of 530048 blocks.
md: bind<sdc2>
md: bind<sdd2>
active port 0 :139
active port 1 :445
active port 2 :20
md: md4: recovery done.
RAID1 conf printout:
--- wd:2 rd:2
disk 0, wo:0, o:1, dev:sda2
disk 1, wo:0, o:1, dev:sdb2
md: md0 stopped.
md: md0 stopped.
md: md0 stopped.
md: md0 stopped.
md: bind<sdc3>
md: bind<sdb3>
md: bind<sda3>
raid5: device sda3 operational as raid disk 0
raid5: device sdc3 operational as raid disk 1
raid5: allocated 67488kB for md0
0: w=1 pa=0 pr=4 m=1 a=2 r=4 op1=0 op2=0
1: w=2 pa=0 pr=4 m=1 a=2 r=4 op1=0 op2=0
raid5: not enough operational devices for md0 (2/4 failed)
RAID5 conf printout:
--- rd:4 wd:2
disk 0, o:1, dev:sda3
disk 1, o:1, dev:sdc3
raid5: failed to run raid set md0
md: pers->run() failed ...
md: md0 stopped.
md: unbind<sda3>
md: export_rdev(sda3)
md: unbind<sdb3>
md: export_rdev(sdb3)
md: unbind<sdc3>
md: export_rdev(sdc3)
md: md0 stopped.
md: md0 stopped.
md: bind<sdc3>
md: bind<sdb3>
md: bind<sda3>
raid5: device sda3 operational as raid disk 0
raid5: device sdc3 operational as raid disk 1
raid5: allocated 67488kB for md0
0: w=1 pa=0 pr=4 m=1 a=2 r=4 op1=0 op2=0
1: w=2 pa=0 pr=4 m=1 a=2 r=4 op1=0 op2=0
raid5: not enough operational devices for md0 (2/4 failed)
RAID5 conf printout:
--- rd:4 wd:2
disk 0, o:1, dev:sda3
disk 1, o:1, dev:sdc3
raid5: failed to run raid set md0
md: pers->run() failed ...
eth1: stopped
eth0: stopped
eth1: started
eth0: link down
eth0: started
eth0: link up, full duplex, speed 1 Gbps
eth1: stopped
eth1: started
eth0: link down
eth0: stopped
eth0: started
eth0: link up, full duplex, speed 1 Gbps
active port 0 :139
active port 1 :445
active port 2 :20
rule type=2, num=0
Loading iSCSI transport class v2.0-871.
iscsi: registered transport (tcp)
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=1
rule type=2, num=0
active port 0 :139
active port 1 :445
active port 2 :20
Wake up disk 0 immediately.
Wake up disk 3 immediately.
Wake up disk 2 in 9 seconds.
Wake up disk 1 in 9 seconds.
Wake up disk 2 immediately.
Wake up disk 0 immediately.
Wake up disk 1 in 9 seconds.
Wake up disk 0 immediately.
Wake up disk 2 immediately.
Wake up disk 1 in 9 seconds.
Wake up disk 0 immediately.
Wake up disk 3 immediately.
Wake up disk 2 in 9 seconds.
Wake up disk 1 in 9 seconds.
Wake up disk 0 immediately.
Wake up disk 3 immediately.
Wake up disk 2 in 9 seconds.
Wake up disk 1 in 9 seconds.
[~] # fdisk -l
Disk /dev/sda: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 66 530141 83 Linux
/dev/sda2 67 132 530142 82 Linux swap / Solaris
/dev/sda3 133 243138 1951945693 83 Linux
/dev/sda4 243139 243200 498012 83 Linux
Disk /dev/sda4: 469 MB, 469893120 bytes
2 heads, 4 sectors/track, 114720 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/sda4 doesn't contain a valid partition table
Disk /dev/sdb: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 66 530141 83 Linux
/dev/sdb2 67 132 530142 82 Linux swap / Solaris
/dev/sdb3 133 243138 1951945693 83 Linux
/dev/sdb4 243139 243200 498012 83 Linux
Disk /dev/sdd: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdd1 1 66 530125 83 Linux
/dev/sdd2 67 132 530142 83 Linux
/dev/sdd3 133 243138 1951945693 83 Linux
/dev/sdd4 243139 243200 498012 83 Linux
Disk /dev/sdc: 2000.3 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 66 530125 83 Linux
/dev/sdc2 67 132 530142 83 Linux
/dev/sdc3 133 243138 1951945693 83 Linux
/dev/sdc4 243139 243200 498012 83 Linux
Disk /dev/md9: 542 MB, 542769152 bytes
2 heads, 4 sectors/track, 132512 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/md9 doesn't contain a valid partition table
Disk /dev/md4: 542 MB, 542769152 bytes
2 heads, 4 sectors/track, 132512 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/md4 doesn't contain a valid partition table
[~] # exit
logout